Type writing machine



' 1. H, BARR. TYPE wRmN'G MACHINE.

APMCATION FILED MAH. 31H91?.

Patentd July 29, 1519.

(y SHEETS-SHEET 1.

INVENTDR I. H. BARR. TYPE WRITING MACHINE. APPLICATION FILED MAR. SI` 1917.

Patented July 29, i919.

4 SHEETS-SHEET 3.

n? Iy TM 'HIS ATTURNEV emmen aislado JOHN H. BARR, OF NEW YORK, N. Y,`SEIG-NGR T0 REMINGTON TYPEl-VRTER OB'IANY, OF ILON, NEWYQRK, A Ci'RPOMTION GF NEEV YQRK.

Patented July 20, let.

Application'led March 31, 193.7. Serial No. 158,913.

Ljlil'ji, Specricaton of Letters Patent.

To all ywhom t may Concern: I

Be it known that I, JOHN H, BARR, citizen of the Unite-d States, and resident of the borough of Manhattan, city of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Type-Whiting li/iachines,

of which the following is a specification.

My present invention relates to printing mechanism for typeivriting machines, and its principal object is to provide improved type bar mechanism including devices for operating the type bars to cause them to print and for .controlling their position to vary the case or select the types.

To the above and other ends which will hereinafter appear my invention consists in the features ot construction, combinations of devices and arrangements of parts hereinafter described and particularly pointed out in the claims.

The preferred' form oi my invention is illustrated in the accompanying drawings wherein- Y y Figure l is a front to rear vertical sectional view of a typewriting machine em- 'bod infT m invention )arts of the machine es a bemg omitted.

Fig. `2 is a transverse vertical sectional View, taken on planes indicated by the broken dotted line a' in 5F ig. l and looking rearward.`

Fig. 3 is a view corresponding to Fig. 1 but showing the position of the part-s When the type bars are shifted to print in upper case.

Fig. a is a perspective view illustrating more especially the mechanism for varying the case position of the type bars.

Fig. 5 is a perspective view on va reduced scale of a support for the liey levers and certain other parts.

Fig. 6 is a view or" one of the type actions on a reduced scale. Y

Referring' first to-Figs. i and :2, the main frame of the machine is shown as comprising side plates l and a rear plate 2 provi with ears 3, the side plates and rear l i e being secured in fixed relation by screws si. A supplemental U-shaped plate 5 for protecting the keyboard is secured to the side plates 1 by screws (3. 'lhe side plates are eut out as indicated at la. The top plates that surn'iount said side plates are omitted from the drawing. si. platen Y, e

l the top matically illustrated,ris mounted in a carriage ior movement back and iorth across feeding devices, which are not herein-dis closed but may be of any desired construction.

Type bars 8, each provided at the outer end oi its shank or body portion with a ty `e block 9 having two types, are disposed in an are below the platen and are adapted to cooperate with the front face thereof. The type block is slotted to straddle the type bar, the outer end whereof may be curved as indicated along its top edge to promote favorable Contact with the type block which is secured in place in any suitable Way as by soldering. The type bars are arranged in guide slots, indicated at l0, which guide slots are cut in a vertically disposed type bar support or segment ll radially of a point. e below the printing point. Except the center type bar or bars, the type bars, as

n is Well understood, are bent just below the a common pivot Wire l2 passing through the,

perforations which wire is suitably secured to the segment l1. The type bars are horizontally disposed and near their printing ends are normally supported on a rest or pad 13 secured in a groove formed in a segmental member l which arranged vertically and orivardof the type bar segment, and is suitably secured thereto and supported thereby as by rods or bars l5 extending forward from the segment near its ends, and to which the end portions of the segmental member are fixed. y

The type bar support or element comprising the proper ll. and the supplemental segment or member le is mounted vertical shitting movements` and for th purpose lateral arms or brackets i6 are secured to the segment il in any suitable manner, as by screws l? and dowels i8. The supporting and guiding means for the segment comprise tivo pairs of parallel bars or arms i9 and 20, both pairs substantially horizontz-lly disposed, the pair being1 arranged above the pair 220 The arms i9 are at i ci the mac .ne

plate under the control of carriage' segment, the

and their *forward end portions are pivotally connected with the segment extensions 16. The extensions 16 terminate in rearwardly extending parallel ears 16?' which receive shoulder screws 21 that pass loosely through the arms 19. Each shoulder screw has a hexagonal head terminatingl .in arounded top 212.' The tops 21n cooperate with the heads of screws 22 that are thread ed into the side plates 1 and project inward therefrom, said screws heine held in adjusted positions by means ot' jamming nuts 22a. The heads of tlietscrews 22 have no nicks, the nicks being preferably in the ends of the Shanks. The screws 21 and 22 cooperate to prevent lateral vibration or displacement or" the segment. The rear ends of the arms 19 have tlxed pivots 23 projecting; inward trom the sides the plates 1. The lower pair of arms `2O are arranged Within the hase near the sides thereof, their rear end portions being provided with hubs 24e (Fig.V d), which are Secured by pins or set screws 25 to a roch shaft 26 which has bearings fixed on the plates 1. The fori ard ends ot' the arms 2O are pivotally connected to a trame or Supplemental portion ot the segment 11, which trani@ is adjustalily counected to said segment and carries stops ior limiting the up and down movements 'thereot'. Said trame comprises two vertical rods or bars 2i" and a connecting" cross har 23 (Figs. l, 3 and et). rlhe rods 27 are arranged at the sides of' the segment 1l. The upper end portion of each rod is reduced and screw threa-dlfl as indicated at 27'". The threaded portions engage in threaded openings in the extensions 16 and below such extensions carry locking nuts The lower ends ofthe rods 2i' are formed with hexagonal heads'il and below these heads terminate in reduced threaded portions 31 on which are nuts 32 The cross har 28 is confined vbetween the hexagonal heads 30 and the nuts 32 which Serve as clainps to make the frame comprising; the rods 2'." and the cross bar 28 rigid. By looseningr the nuts 32 the md5 27mm? b@ I'Otiol on their axes by a 4Spanner or other tool applied to the hexagonal headsI 30, the nuts 2S) ot' coarse being;` also loosened to permit ot such rotation. As a result oit Such rotation the frame 27, 23 and the segment 11 may he relatively ad justedf, and after such adjustment may be rigidly held or set in fixed relationship by tightening or jamming the nuts 2S), After thus adjusting or re-adjusting the frame and nuts 32 of course should he tightenmh 'lraekets 33 are secured to the under tace ot' the cross har 28 in any suitable way1 aS by spotoveldingr. each bracket comprising a pair of do\\'n\va1dl \Y extending); ears 34 between which is loosely arranocd the forward end oi i teeth. The spring;v

one of the arms 2d.. Cross pins secured lathe ea Si ally connect the arms 20 with the cross bar and consequently with the type bar setzment. ll`he end portions ot' the cross bar 28 project outward beyond the rods 2T and are provided with pads, 36 of fiber or the like at their top and bottom faces. These pads constitute stop devices, each pad cooperatingl with a Stationarv sto-p device. Th) stationary'stop devices are constituted `-by brackets 37 cast as apart ot or other- 'wise suitably secured to the side plates l.,

and each bracket7 as liest shown in Fig. ll, comprises an inwardly extending lug or Stop proper 38 and a lower inwardly extending lug The lug 39 is broader than the lug; 38 and provides a support Yfor an adjustable stop plate proper 40 which is connected to its support- 39 by three screws, the two outer screws #l1 being headed and passing upward loosely through 'the support screwing into threaded openings in the stop plate ett). The middle screw 42 is threaded through the support 39 and almts against the lower face ot the Stop plate 40, holding it in its uppermost posit-ion as determined by adjustments ot' the side. screws d1. T he upper pad 3G on each side of the Stop har cooperates with a lug 38 to limit upward movement; oit the trame 27-23 and segment ll while the under pads 3G the stop plate et() to limit downward movements of said parts. Normally the segment is maintained in its upper position, as shown in Figs. 1, 2 and al., by spring devices, Said spring' devices comprisinga Wire spring; d3 coiled around the rock sha-tt 2G at its letthand side. The inner end ot said spring is hooked into an angular bracket l screwed to the rear ot the 'frame plate 2, thus providing a stationary anchorage for the spring'. The left-hand end portion of the spring is secured in a collar loosely mounted on the shait 2G. rllhe outer end portion ot said collar is provided with ratchet teeth which engage with correspond- .ingr ratchet teeth t'iin'med on the inner face ol the lett-hand hub 2. rl`he collar is provided with holes to receive a tool by which it may be rotated to provide for varying the tension of the spring i3. After adjustment the springy serves to maintain the collar set by engagement of the two sets ot' ratchet fled. acting1 through the arms 2d normally overcomes the force ot gravit-y and maintains the type bar and the 'trame depending therefrom in up-` per position with the top lstop pads 3G engaged with the lugs 38. ln this position the inner or lon'er case types on the type blocks t) are adapted tor printing'.

ln order to shift or depress the segment 'tor printing with the outer or upper case l: operated devices are provided, ,vices operating; on the shat't 2li to roch ant., sivi or more the arms 'lll and concoperate with segment ico " mined by the Leiters nected parts downward. The key operated deificescomprise a bail or member 46 having a body or cross portion 47 and two downwardly bent'parallel arms 48 provided with hubs 49 which bear loosely on the rock shaft 26 outside the crank arms 20. A central upstandiiig rod or arm 50, fixed to the rock shaft 26, is provided with a T-head 51 to which the bail 46 is secured by screws 52 passing downward through the cross portion The construction is such that the central portion of the bail is fixed to the central portion of the .rock shaft, the end portions or arms 48 oi the bail bearing loosely on the rock shaft. Lateral pins 53 extending outward from the upper end portions of said arms are engaged loosely by the rear ends of horizontally disposed links 54. said links being,y provided with slots indicated at 55 which receive the pins 53. The forward ends of said links are pivotally connected at 56 with the upwardly extending arms 57 of shift key levers, which further comprise torwardly extending arms 58 and hub portions 59, said arms 58 terminating in shift keys 60. IThe hub portions 59 bear rotatably on a transverse .pivot rod 61 secured at itsl ends in the side plates 1. Draw springs 62, anchored at their rear ends to stationary pins 63 and at their forward ends hooked into the arms 57, restore the trains of key operated devices y comprising the parts 54, 57 and 58 to normal or lower ease position after a downward shittingl operation and tend to maintain the lever arms 57 engaged with stop pins 64 that project laterally inward 'from the side plates l. The construction is suoli that the keys 6() are independent of each other, the loose or lost motion connection 53.55 permitting the bail 4 6 and rock shaft 26 to be rocked by depressing one of the-keys 60 without afecting the other key and the parts controlled thereby. The ,keys (i0 are spaced apart, being arranged at opposite sides of the printing keyboard and the angular levers 57 58 may be kept in proper position on the pivot rod 61 by means of fixed collars 65 which loosely confine the hubs 59 between said collars and the adiacent side plates 1. lt will be observed that as a result of the described construction the pull. 'transmitted to either link 54 actuated by the associate shift key 60, is further transmitted through the pin 58,. bail46 and arm 50 to the middle portion of the rock shaft 26, so that the torsion to which such rock shaft is subjected does not produce unequal motion of the two links or arms 520. Also it will be observed #that the shi' is provided with stop devices comprising1 the parts and 3l' which are independent ofthe stop devices 64 oit the actuating mechanism controlled by the keys GG; also that after the eiitentot sh'ttinn move et the segment 1l. and its depending;

-f`iive adjustment et the enlargement 67.

it?, ashes been stops 38 and 40, thc position or location ot' the segment 11 may be independently varied or set through adjusting thc relationship between said segment and its trame 2T, 28, as has been described. During the up and down shitting movements ot' the segment the rounded tops 21l ot the headset the screws 21 coperate with the heads ot the adjustable screws 22 to assist in guiding the segment, preventing undue sidewise movement or vibration. 'lhe screws 22 are so adjusted in respect to the'screws 21 that the free up and down shiit `ofthe segment is not impeded but any undue side movement is prevented. The heads of the screws 22 are of such diameter that in both lower and upper case positions the rounded tops 21n are contiguous to said heads so that at all times'the segmentis guided and controlled in respect to lateral vibration. It will be further understood that a lock of any siiitable description may as usual be provided in connection with one of the shift key levers to hold the segment depressed-iii upper case position. The case shitting mechanism per se is not c aimed herein but has been made the subject-matter ot a divisional application Sr. No. 190.896 iiled September 1l., 1917. Y

The actuatingl mechanism of the type bars will next be described. Each type bar 8 has .U5 a heel or pivot portion which is substantially at right angles to the body or shank and is somewhat wider than the body et the bar and this heel portion is formed longitudinally with a slot, indicated at 6G. Said slot lies wholly forwardof the 'pivot 12 and approximately at right angles to' the body or shank incliningr forward and downward, and terminating at its lower end portion in an This slot operates as a cam slot and through it it's type bar is directly connected to a lever oi' drivelwhich is preferably inthe ioi'm et a bell crank having a' loingr arm (58 and a short arm (S9. rllie bell cranks or drivers are mounted in slots indicated at WO, said slots being formed or cut radially in the member 14 at its rear side, the pivots Till of the drivers being supported on said member 14. Each bell crank is substantially in thc radial plane of its type bar7 the long arm (i8 extending under and substantially parallel with the body of the bar, said arm at its rear end being;r provided with an actuating' device or headed pin 71 which engages in the slot G6 and operates the type bar. '.lhe head ot' the pin prevents accidental detachment from the slot but the parts may be readily separated by bringingr ysaid head into register with the eiilarrement 67 which" is slialitl larger than the head. The shorter arms of the bell cranks extend radiallydownward and outward and are connected by horizontally disposed or tore-and-aft links 72 with the upstanding arms .73 et another set ot I bell cranks which further comprise horizontally disposed arms 74, said hell cranks 73, 7 4 being arranged in parallel vertical planes and pivoted on a common pivot wire 7 5,

which supported on a frame that is de-v .is generally rectangular, comprising a rear bar 7G, a parallel front bar 77, connecting end bars 48, and laterally extending lugs 79 and 80. These lugs :receive headed screws 8l and 82 which are screwed upward from the under side into threaded thickened portions of the side plates l, thus detachably securing the frame and the parts mounted thereon to the main frame of the machine. The bar 76 is provided with a series of parallel guide slots 83 at its forward side for the reception of the rear end portions of the bell cranks 73, 74. The vertical arm of these bell cranks, instead of risingl directly upward from the pivots 75, are preferably disposed some distance forward of the pivots along the arm 74 so as effectively to clear the cross bar 76, but it will he apparent that these levers 7 3, 74: are essentially bell cranks. The upstanding lever arms 73 vary in length, increasing progressively from the middle or center to the sides of the system, as willhe understood-from a consideration of l and 2. The lever arms G9 are all of the same length but since their pivots are at different heights, increasing progressively from the 'middle to the sides of the system, the arrangement provides for the links 72 which connect the arms 69 with the arms 73, being all parallel with each other and substantially horizontally disposed to give a straight fore and aft pull, these links conforming to the lines in which the planes that contain the lever arms 69 intersect the planes of the lever arms 73. In order to compensate for the variations in the lengths of the arms 7 3, that is, in order that the upper ends of these varying arms shall all move to the same extent so as to communicate the same extent of movement to their respective type hars, the arms 7 a are lcorrespond]ngly varied, this ,being preferably effected by variably locating, in respect to the pivot 75, the devices which receive actuation from the key levers. Said devices in the present instance are in the form of headed pins Sil. These headed pins engage in longitudinal cam slots indicated at S5 formed in the rear end portions of key levers 8G and 87 which are of the irst order. There are two kinds of key levers, differing somewhat in shape, the key levers 86, which are provided with printingkeys 88, constituting the two upper rows. The key levers 86 are pivoted on a fulcruni wire 2&9 which is supported on and, estenda lent rl p reirme wise of the bar 77, said key levers being guided in parallel slots, indicated at 90, formed transversely of said bar at its rear and under sides. The other keyY levers 87, whose keys 88 constitute the loweitwo rows, are pivoted on a common pivot wire 91 forward of and somehat below the pivot wire 89 and also si'lpported on the bar 77. The key levers SG curve downward, forward of their pivots, so as to clear the pivot wire 91 which they pass under. lt will be understood that by varying the points of connection by changing the positions of the plus 84 the amount of motion communicated to the levers 723, 74, from their connected key levers, may readily be varied. The construction is such that by setting the pin farther from-the fulcrmn 75, it is brought correspondingly nearer to the fulcrums 89 and 91 so that not only is the motion it receives from the key vlever reduced but the amount of motion it communicates to the lever arm 74 'is correspondingly reduced. ln ot er words, the motion imparted 'to the pin Si is thus reduced and the pin being farther from its own fulcrum further reduces the mot-ion communicated to the lever 7 3, 7 lt is apparent that the longer the lever arm 723 the farther from the fulcrum 7 5 along the arm 74 is the pin 84 fixed or set. forward ends the key levers cooperate with a stationary slotted guide or comb plate 5E. Spring devices for restoring the type bars to normal position after actuation are provided, comprising draw springs 92 which are connected to the lever arms 69 and extend horizontally forward, the forward ends of said springs being hooked over radial hook portions 93 formed along the lower edges of -plates 9i that are secured to a segmental angle-plate 95. Threaded through the plates 94 and 95 are sul'iporting screws 9G which are provided with reduced inner ends 97 that form shoulders with the bodies of the Screws and tit loosely in holes in the front flange of the segmental member ll. There' are three of these screws 96, one at the -middle and the other two near the opposite ends of the segmental plate 95, and the construction is such they hold the plate suitably spaced away from and forward of the supporting member l-l, the springs 92 helding the plate in a position determined by contact of the shoulders on the screws 9h with the front face of the member 14. 'By screwing in or out on these screws the plate may be moved backward or forward and the tension of the springs 92 correspoinlingly varied. l't will be understood that when one of the key levers depressed the bell crank 73, 7-1 that is directly connected to it is rocked, this motion being transmitted `through the pull link 72 to the connected hell crank GS, (39, said bell crank operating through its pin 7l.' on its can: slot 66 te Near their iso nari,

swing the connected type bar upward and rearward to print against the platen 7. Preferably the type bars are provided with shoulders 98 that, toward the latter part of the type bar movement, cooperate with a universal bar 99 that is comprised in the carriage feeding mechanism, the universal bar being mounted to shift with the segment ll. llfhen said segment is in the topmost or lower case position, the inner type will print as has been stated. lVhen, however, one of the shift keys has been depressed from the full line position shown in lfig. l to the full line position shown in Fig. 3, the type bar segment will be lowered or depressed, asehas been explained, so that it then one ot' the printing keys be actuated the outer type on the connected type bar )vill be caused to priiitas will be1apparentrffrom the dotted line positions of the parts illustrated in Fig. 3. llhis ligure illustrates the left-hand shift key as depressed. The right hand shift key not illustrated in said ligure will remain-in its normal position, since the slot 55 in the associate link will permit the right-hand pin 53' thatv engages it to move idly forward.

lily present invention provides for an et fet-tive type action and one which is especially adapted for use in. a machine in which the type bars are shitable to change case.

lt will be observed that by my present invention there is provided a type bar cornprising a shank or body portion and a heel portion substantially at right angles to the shank portion, said heel portion being adapted for pivotal mounting at its upper end and being alsoprovidedwith a longitudinally arranged slot; that said slot is likewise substantially at right angles to said shank; that said heel portico is perforated at its end and is provided with an angularly arranged slot between said perforation and the shank or body of the bar; that coinbined with a platen there is a set, se 1ies or system ot' type bars; that the Set of type bars is arranged in an are of a circley below the platen, said type bars being guided as by radial or converging slots in a support or segment and norioally extending forward in a horizontal direction from their pivots and being provided or formed with slots torvvard of their pivots, said ts being diagonal or inclined forward a downward; that a set of levers are :lire l connected to the tvpe in de of the pivots or t'ulerurnshoi said levers;4 that saidiilcrums are arranged at different elevations, being in a curve or are of a circle, the center whereof is in the horizontally disposed straight line. ,2" (Fig. 1') below the printing point g1, whichc'- line contains als.; the center of the arc centaining the type hanpivors; that said levers in the; lnfscnt instaan-1 have a" E era 5 type bars; that the -type bars are operated by a set of keys which are connected by trains oit devices with the levers aforesaid, the connections of said trains of devices with the levers 'being at different sides of the tulcrums of said levers from the pin and slot connections ot said levers with the type bars; that the points. oi' connections between the trains of devices and said levers are in an are of a circle, the center whereof is in the horizontal straight line z aforesaid; that said levers in the present instance are bell cranks having their longer arms extending normally Substantially parallel with the type bars and their shorter arms lying -in radial planes, said shorter arms extending downward and outward, and all being equal in length; that the connections between the printing keys and the bell cranks or levers comprise links which extend under said longer arms substantially parallel therewith, said links being connected to said shorter arms; that the trains of connecting devices or the connections between the keys and the bell cranks aforesaid comprise further a second slet of bell cranks; that said second set of bell cranks in the present instance are directly connected with the key levers on which said keys aremounted, such connection being by means of pins and slots, the key levers being provided with cam slots and the second set ot' bell cranks with engaging pins on their horizontally disposed arms; that the other or upstanding arms ot said second set vary in length increasing progressively from the middle to the sides ot' the system; that said links communicate fore and aft pulls from one set of bell cranks or connecting levers to the other set of bell cranks or connecting levers; that the points ot connection of the links with the forward bell cranks are-in a common transverse plane forward of another transverse plane containing the points of connection between said links and the rear bell .cranks or those connected to the key levers; that said links lie substantially both in the vertical parallel tore and aft planes containing the key levers and their connected bell cranks, and also in the radial or converging planes containing the type bars and the bell cranks connected directly to said bars; that the links aforesaid while horizontally disposed, generally speaking, are. normally inclined at a slight angle to the horizontal and above it but are shiftable downward to a corresponding,r angle below ine horizontal when the case shifting operation occurs; that such case shifting is e'fi'ected by shifting the slotted support or segment on which the type bars are mounted; that the shiftable element cmf the type bar segment or support I the supplemental curved memis lined to and carried by said rd support for the type :reinem .7

tending arms with said upwardly extending alms and beingl substantially parallel with each other, the pivots of said first specified set of bell cranks being contained in an are o f a circle of greater diameter than is the diameter of the circle in an are of which the pivots of the type bars are contained.

8. In a front strike typewriting machine, the combination ot a set of type bars arranged in converging planes, a set of levers having pin and slot connections with said type bars and also arranged in converging planes, the pivots of said set of levers being contained in an are of a circle of substantially greater diameter than is the diameter of the circle in an arc of which the pivots of the type bars are contained, key levers arranged in parallel planes, another set or levers havingpin and slot connections with said key levers and arranged in parallel planes, and fore and att links connecting said sets of levers and lying in the planes of both of said sets of levers.

9. In a front strike tyjlewriting machine, the combination of a set of type bars arranged in converging planes, bell cranks having pin and slot connections with said type bars and also arranged in converging planes, the longer arms of said bell cranks being arranged under and parallel with their associate type bars, key levers, and connections between said key levers and the shorter arms of said bell cranks, said connect-ions comprising a set of levers and a set of links, the pivots of said set of bell cranks being contained in an are of a circle of greater diameter than is the diameter of the circle in an are of-which the pivots of the type bars are contained.

l0. In a front strike typewriting machine, the combination of a set of type bars arranged in converging planes, bell cranks having pin and slot connections with said type bars and also arranged in converging planes, the longer arms of said bell cranks be; ing arnanged under and parallel with their associate type bars` thepivots oit said first specified set ofl bell cranks being contained in an arc of a circle or" greater diameter than is the diameter of the circle in an arc of which the pivots of the type bars are contained. key levers, a second set of bell. cranks having pin and slot connections with said key levers and also"comprising upwardly extending arms, and means connecting the two sets of bell cranks.

11. In a front/strike typewriting machine, the combination of a. set of type bars arranged in converging planes, bell cranks having pin and slot connections with said type bars and also arranged in converging planes, the longer arms ot said bell cranks being arranged under and parallel with their associate type bars, the pivots ot'said position, said type bars having slotted portions forward of their pivots, the slots eX- tending diagonally forward, levers having actuating devices engaging with said slots, said levers being arranged in radial planes corresponding with the planes of the type bars, a set of key levers arranged in parallel vertical planes, and connections between said key levers and said first recited levers.

13. In a type bar action, the combination of a series of key levers of the first order having elongatedv slots in their rear arms` vand a series otl bell cranks having pins at different distances from the fulcrurns of said bell cranks and engaging said slots at different points in their lengths.

1l. In a front strike typewriting machine, the combination of a set of type bars, a set of bell cranks directly connected to said type bars and having their longer arms extending normally substantially parallel with said type bars and their shorterarms in radial planes, keys, connections between said keys and said. bell cranks, said connections comprising links extending under said longer arms. substantially parallel therewith and connected tio-said shorter arms, and means for shifting 'said type bars and said bell cranks, the end portions of said links that are connected to said bell cranks participating in the shifting movement.

15. In a front strike typewriting machine, the combination' of a set of type bars, a set of bellcranks directly connected to said type bars and having their longer arms en tending normally substantially parallel with said type bars and their shorter arms in radial planes, keys, connections between said keys and said bell cranks comprisin fore and aft links extending under the enger bell crank arms and at their forward ends connected to the shorter radial arms of said bell cranks, andl means for shiftino said type bars and said bell cranks, said5 links shifting at the same time-about their rear ends as centers.

16. Ina front strike typewriting machine, the combination of a set of type bars arranged in an arc of a circle and extending forward from their pivots when in normal position; a set o't'bell c anks directly connected te said type bars and having; their long-er arms extending normally' substantially parallel with said type bars; keys; connections between said keys and the shorter arms of said bell cranks, said connections comprising a second"set of bell cranks and links connecting said second set of bell cranks with the shorter arms of said first recited bell cranks; and means for shifting` said type bars and said first recited Set of bell cranks, said links shifting, at the same time about their points oi connection' with said second set ot bell cranks.

17. In a front strike typewriting machine, the combination of a set of type bars; a set oi key levers; connections between said type bars and said key levers comprising a set of.

bell cranks having cam connections directly with said type bars, a second set of bell cranks having' cani connections directly with said key levers, and a set of links connecting said sets o'l bell cranks; and means for shifting said type bars to change case, said first rccitedbell cranks shitting with said type bars and said links also shifting about their points ot connection with'said second set ot' bell cranks.

18. ln a front strike typewriting machine the combination olf a set of' radially arranged type bars., a set oit levers directly connected to said type bars and arranged in radial planes corresponding with the planes ol the type bars, a set of keylevers, another or second set ot' levers having direct connections with said key levers and arranged in vertical planes corresponding with the planes oi' said levers, links for communicat ing` direct lore and att pulls from the members of one of saidsets of levers to the meinbers of the other of said sets of." levers, and means for shittingf said type laars o change case, the first recited set ci levers shifting with said type bars and said links also shiitf ing about their points ol" connection with 'said second set oi levers as centers, said links in one ease position. making an angle with the li'fnir/.ontal at one side thereof and in the other case position making a corresponding' angle at the opposite side of the horizontal.

19. .ln a front strike typenf'riting machine, the combination of a platen, a type bar supnort, means ior shitting' said type bar support, a set oi type bars arranged in radial slots in said support, bell cranks also arranged in radial slots in said supports and haa/ing4 pin and slot connections with said type bars, the pivots of said bell cranks being' in a plane forward oli' the plane of the bar pivots, key levers, and connections from said bell cranksto said key levers, said connections comprising horizontally disposed links extending rearward from their connections with the bell cranks, said links turning about their rearward points ot' connections as centers during the case shifting operations. y

20. ln a front strike typewriting machine, the combination orf a platen, a type bar support, means for shifting said type bar support, a set of type bars arranged in radial slots in said support, bell cranks also arranged in radial slots in said supports and having pin and slot connections with said type bars, the pivots of said bell cranks 'oein a plane forward of tlie plane of the type bar pivots, key levers, and connections from said bell cranks to said key-levers, said connections comprising horizontally disposed links extending rearward from their connec tions with the bell cranks, said links turning' about their rearward points of connections as centers during the case sliiftinff operations, said connections comprising inks which in one case position occupy an angle with the horizontal and in the other case -position are shifted to a corresponding angie at ,the opposite side of the horizontal.

2l, ln. a :iront strike typewriting machine, the combination or a set of type bars, a set of bell cranks directly connected to said type 'fbars and having their longer arins extending normally substantially parallel with said type bars and their shorter arms arranged in radial planes, said shorter arms being substantially equal in length, key levers, another set or bell cranks operated by said key levers and having .npstanding arms which vary progressively in length from the middle to the sldes of the system, ifore and aft links connecting said npstanding arms with said 'radially extending arms, said links each normally standing at an inclination to and above a horizontal line, and means ttor shifting said type bars and said. liist recited bell cranks, said links as a snlt et saidsliifting movement being swung to an angle below the horizontal corresponding to the former angle above the horizontal.

Signed at the borough of li/ianhattan, city of New York, in the county ot' New York,

'ew York this 30th da f oif and State of la March, A. D. lill?.

` JOHN l-l. BARR. Witnesses Amana CRAIG, MARTHA Wein. 

